Tire structure



A. B. BROLUSKA TIRE STRUCTURE Filed Oct. 11, 1924 AMV/.AN 5....

March` 6, 1928.

Patented Main 1928.

l UNITED STATES B. BBOLUSXA, OF DETROIT, IICHIGAN rias srnuc'rua'a,

Application led October 11, 1924. Serial Ho. 743,119.

This invention has reference to tire struc` tures and the object of the invention 'is-to provide a cord. tire of either the high pressure or low pressure balloon t pe in whichthe cords all run in the same irection continuously.

nother object of theinvention is to provide a tire comprsin cords extending at an angle to ythe plane o the tire and having a circumferential tension band so that the driving strain is taken oi from the cords.

Another object of the invention is to` pro-v vide a tire structure in which .the cords are embedded in rubber and all run inthe same. direction to reduce the possibility of internal 'K friction between the cords 'of the tire whichoccurs when the cords are interlaced in different directions.

Another object of theinvention is to provide'a tire which will not readily rim cut and which has a cushion' support between the 'if tube and the rim.

These objects and the several novel features of the` invention are hereinafter more' fully described and claimed and the referredform of construction by which t ese objects are attained is shown in the -accompanying drawin which is a crosssection of a tire casing em ying my invention.

As shown in the drawmg two annular base members 1 and 2 are provided about which the cords 4 are wound. The cords are wound around the tire form'to the member v2 and thence back to the member 1 as will be un'- derstod from the drawing. In this wayl the cord casing may be builtlup into two, four, six,'eight or more layers depending upon the thickness of wall desired. In this ma`nner a single cord may be wound back and forth to form a double layer of cord structure of the casing and a layer ofraw rubber is positioned in the space between the layers and A over which the cordsare wound. A la er of cushion gum is then u t over ,the hrst double layer of wound cor s and a new layer orl cords is wound over the cushion gum. The new. layer of cords is then covered with cushion m and the next layer of cords is wound t ereover.A It will be notd that in each winding a double layer of cords is built up and thus the tire is, built up in`two, four, six, eight or more layers depending upon the strength of tire desired. When 'the first laye'. is started the rubber insert 5 is positioned as shown and carries a canvas or fabric circumferential'tension band 6 to take the driving strain off from the cords and tends to strenV then the' tire at the tread. The' outer an inner surfaces of the cord carcass are then covered with cushion gum indicated by 20 and 21 shownin the drawing anda canvas or fabric circumferential tension band 7 is positioned on the periphery Y of the carcass th'us formed and a`layer of raw rubber 8 .is positionedover the carcass before the tread 9 is mounted thereon. On the inner side of the tire a raw rubber r-A tion 410 is provided'and a canvas or fa ric circumferential tension band 1.1 is provided within theportion 10 and the inside of the tire isl lined with cushion gum 12. 'lhe rubber portions 10 and 12 forma'cushion for i the inner tube-`of the tire which fits in the that when thetube is inserted in thetire it Y is above the flan es of the rim and the tire will not easily rim cut and blow out. In this tire construction a perfectly spaee'is provided for the tube so that the inner tube of the tire is not forced out of shape.- aWith the cords all running in the same dlrectionthe tire ismade extremely exible and the canvas tension vbands absorb the driving strain and relieve the cords .tion in which the 'cords' all run inthe same direction a tire using as much as eight plies of cords maybe use andwill be as flexible or more flexible than a tire of the usual balloon type thus giving a. greater cushion bed when riding.

Preferably the intermediate tension band 6 extends and is secured to thebase mem# bers, the purpose of .which is to strengthen round Aof strain to a great extent. In this, constructhe. tire tovprevent side deliection or shi-mimy1ng`as,it is commonly called. In this manner a tire may be built upy having the desired number' of layers of cords and in which layers of rubber are provided between the cord layers asjpreviously stated. The tension bands 7 and 11 on the exterior and interior of the cord layers respectively ilo extend a short distance each side ofthe center plane of the tire providing a protection for the tread side as well as providing a tension member as described. The intermediate tension band 6 is preferably carried to the two base members as described and with this arrangement I secure a tire that is of great'resistance to puncture on the tread side and is of maximum flexibility in the side walls.

The described arrangement of layers of cord and rubber and the tension. members lying with the side edges in equidistantly disposed relation relative to the center plane of the tire produces a tire of the balloon type that, while fairly puncture resistant in the tread surface is highly flexible due particularly to the interposed layers of rubber. The side walls are comparatively thin, only one of the tensionmemhers being carried to the annular base members and thus, while of considerable strength, is much more flexible than the tread surface which isa 'de-f sired characteristic in this type of tire. Fur- 'thermore, by extending the side walls beyond the annular base members to approximately the center plane of the tire a'hollow interior of a truly circular form in cross section is provided for the support of Aan inner tube which, although not here shown,

is to be placed within this casing. With circular inner wall of the casthis complete ing supporting the inner tube at all points there is less liability of injury to the inner tube upon a collapse of the tire for any reason as the tube does not extend to between the flanges of the casing as is the usual practice.

From the foregoing description it becomes evident that the device is very simple in construction and efficient in operation, is strong and flexible, will not readily rim cut or blow out and provides a device which accomplishes the objects described.

Having thus fully described my invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is A tire structure comprising a pair of annular base members, a series of layers of cords wound around the base members and shaped to form a carcass, said cord layers heilig embedded in rubber, a tension band extending about the tire circumferentially layers of cords, a similarly positioned band on theexterior of the carcass, and a` third similar tension band on the interior of the .tire structure being vulcanized to secure the parts in the said relation.

In testimony whereof I sign this specifition.

AMEL B. `BROLUSKA.

.of the casing on the tread side between the 

